Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cc1205d77d0b83…

MALICIOUS

PDF

220.3 KB Created: 2021-04-03 02:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f070426f95783ccb0b51307dc29bcd79 SHA-1: 21a61e20f39ee5580e88d2089a589b02fb016de9 SHA-256: 56cc1205d77d0b837e76e0a9b7caab86dce2f836e9b786e185956e7c6239dc38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL is disguised as a search query to appear legitimate. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9859

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/strik?utm_term=why+is+nigeria+an+important+country+globally In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481271/normal_604b007332e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_605286218618b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370057/normal_6000892d12f5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/82094227498.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_99596726ff0e40d4a3143002e912ad2d.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_15a2fe6d201c4b8aaf7e1ceda9f7eed1.pdf?index=trueIn PDF document text
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_12bdd7f8db134825ae10592ebd238a12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokamoba/60724105093.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/silabus_biologi_sma_k13_revisi_2018.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_e59d59f94b7346aaa146ece971c043d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/what_are_personification_examples_for_dogs.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/journal_entry_accounting_template_excel.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_55c90825faca4d9180b3061e086f7b1d.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_2e26f33b297a40c89f2e24e1d5bad727.pdf?index=trueIn PDF document text
    • https://8dea6f00-b35b-4e5f-9f5e-01d9eb130a9a.filesusr.com/ugd/6a8da5_58e142afd89e455a9c0ef69a6262c55c.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_4c752000c23e41a98f073e95e3acf7e7.pdf?index=trueIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_df484209cc734c97b924cca090a8629e.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_942a0f153eea411ba7deeb0928b6d605.pdf?index=trueIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_1f2fa59adac743079051faf5691fd33d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/casio_g_shock_leather_strap_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/11139048126.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_49755a3147824172b6bd04f1b71260ad.pdf?index=trueIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_0b15088535c247589a62b2a178ea5cc5.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000308ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308ED 5600 bytes
SHA-256: 5e30113faa58e3a2e33372b9cc9ef0f54a0940ad9f992a8ec153a334d9437b5e
font_01_sfnt_off00031bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BDF 14776 bytes
SHA-256: 1adb0bf106c3307bc579dc209796339331398f59fca2182f8139bfc3e27ae270
font_02_sfnt_off00034a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A85 16864 bytes
SHA-256: 32ccb642c4a1e26422a082a45b7acb34ada81d7a366ba90022825bd323b72e61